Lecture 3: Signal encoding techniques

Anders Västberg

vastberg@kth.se

08-790 44 55

Digital Communication System

Source of Information

SourceEncoder

Modulator RF-Stage

Channel

RF-StageInformation

SinkSource

DecoderDemodulator

ChannelEncoder

DigitalModulator

ChannelDecoder

DigitalDemodulator

[Slimane]

Digital/Analog signal

Modulation of Analog Signals for Digital Data

Full Duplex FSK

MFSK Frequency use

DPSK

QPSK

BER for different modulation methods

Analog Data/Analog Signals

Digitizing Analog Data

Pulse Code Modulation

Quantization

Delta modulation